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- /* Copyright (C) 2012 mbed.org, MIT License
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
- * and associated documentation files (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge, publish, distribute,
- * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or
- * substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
- * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
- #ifndef SOCKET_H_
- #define SOCKET_H_
-
- #include "lwip/sockets.h"
- #include "lwip/netdb.h"
-
- //DNS
- inline struct hostent *gethostbyname(const char *name) {
- return lwip_gethostbyname(name);
- }
-
- inline int gethostbyname_r(const char *name, struct hostent *ret, char *buf, size_t buflen, struct hostent **result, int *h_errnop) {
- return lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
- }
-
- class TimeInterval;
-
- /** Socket file descriptor and select wrapper
- */
- class Socket {
- public:
- /** Socket
- */
- Socket();
-
- /** Set blocking or non-blocking mode of the socket and a timeout on
- blocking socket operations
- \param blocking true for blocking mode, false for non-blocking mode.
- \param timeout timeout in ms [Default: (1500)ms].
- */
- void set_blocking(bool blocking, unsigned int timeout=1500);
-
- /** Set socket options
- \param level stack level (see: lwip/sockets.h)
- \param optname option ID
- \param optval option value
- \param socklen_t length of the option value
- \return 0 on success, -1 on failure
- */
- int set_option(int level, int optname, const void *optval, socklen_t optlen);
-
- /** Get socket options
- \param level stack level (see: lwip/sockets.h)
- \param optname option ID
- \param optval buffer pointer where to write the option value
- \param socklen_t length of the option value
- \return 0 on success, -1 on failure
- */
- int get_option(int level, int optname, void *optval, socklen_t *optlen);
-
- /** Close the socket
- \param shutdown free the left-over data in message queues
- */
- int close(bool shutdown=true);
-
- ~Socket();
-
- protected:
- int _sock_fd;
- int init_socket(int type);
-
- int wait_readable(TimeInterval& timeout);
- int wait_writable(TimeInterval& timeout);
-
- bool _blocking;
- unsigned int _timeout;
-
- private:
- int select(struct timeval *timeout, bool read, bool write);
- };
-
- /** Time interval class used to specify timeouts
- */
- class TimeInterval {
- friend class Socket;
-
- public:
- /** Time Interval
- \param ms time interval expressed in milliseconds
- */
- TimeInterval(unsigned int ms);
-
- private:
- struct timeval _time;
- };
-
- #endif /* SOCKET_H_ */
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